<!DOCTYPE html>
<html>

<head>
  <meta charset="utf-8">
  <title></title>
  <link rel="stylesheet" href="../../component/pear/css/pear.css" />
  <style>
    body {
      margin: 0;
      padding: 0;
    }

    .pear-container {
      margin: 0;
      padding: 0;
    }

    .right,
    .left {
      height: 100%;
      position: absolute;
      transition: all .3s;
    }

    .left {
      width: 200px;
      background-color: #f56c6c;
    }

    .right {
      width: calc(100% - 200px);
      background-color: #2d8cf0;
      margin-left: 200px;
    }

    .mini .left {
      width: 0px;
    }

    .mini .right {
      width: 100%;
      margin-left: 0px;
    }
  </style>
</head>

<body class="pear-container">
  <div class="left">
  </div>
  <div class="right">
    <button class="">显示 / 隐藏
    </button>
  </div>
  <script src="../../component/layui/layui.js"></script>
  <script src="../../component/pear/pear.js"></script>
  <script>
    layui.use(['jquery'],function() {
      var $=layui.jquery;

      $("button").click(function() {

        if($(".pear-container").is(".mini")) {
          $(".pear-container").removeClass("mini");
        } else {
          $(".pear-container").addClass("mini");
        }
      })

    })
  </script>
</body>

</html>